diff options
Diffstat (limited to 'buildscripts/phing/classes/phing/filters/StripPhpComments.php')
| -rwxr-xr-x | buildscripts/phing/classes/phing/filters/StripPhpComments.php | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/buildscripts/phing/classes/phing/filters/StripPhpComments.php b/buildscripts/phing/classes/phing/filters/StripPhpComments.php new file mode 100755 index 00000000..0abb8a67 --- /dev/null +++ b/buildscripts/phing/classes/phing/filters/StripPhpComments.php @@ -0,0 +1,188 @@ +<?php + +/* + * $Id: 6c68ae0ad1aa7f2f7825087c1c54233bd2462124 $ + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * This software consists of voluntary contributions made by many individuals + * and is licensed under the LGPL. For more information please see + * <http://phing.info>. +*/ + +include_once 'phing/filters/BaseFilterReader.php'; +include_once 'phing/filters/ChainableReader.php'; + +/** + * This is a Php comment and string stripper reader that filters + * those lexical tokens out for purposes of simple Php parsing. + * (if you have more complex Php parsing needs, use a real lexer). + * Since this class heavily relies on the single char read function, + * you are reccomended to make it work on top of a buffered reader. + * + * @author <a href="mailto:yl@seasonfive.com">Yannick Lecaillez</a> + * @author hans lellelid, hans@velum.net + * @version $Id$ + * @access public + * @see FilterReader + * @package phing.filters + */ +class StripPhpComments extends BaseFilterReader implements ChainableReader { + /** + * The read-ahead character, used for effectively pushing a single + * character back. -1 indicates that no character is in the buffer. + */ + private $_readAheadCh = -1; + + /** + * Whether or not the parser is currently in the middle of a string + * literal. + * @var boolean + */ + private $_inString = false; + + /** + * Returns the stream without Php comments. + * + * @return the resulting stream, or -1 + * if the end of the resulting stream has been reached + * + * @throws IOException if the underlying stream throws an IOException + * during reading + */ + function read($len = null) { + + $buffer = $this->in->read($len); + if($buffer === -1) { + return -1; + } + + // This regex replace /* */ and // style comments + $buffer = preg_replace('/\/\*[^*]*\*+([^\/*][^*]*\*+)*\/|\/\/[^\n]*|("(\\\\.|[^"\\\\])*"|\'(\\\\.|[^\'\\\\])*\'|.[^\/"\'\\\\]*)/s', "$2", $buffer); + + // The regex above is not identical to, but is based on the expression below: + // + // created by Jeffrey Friedl + // and later modified by Fred Curtis. + // s{ + // /\* ## Start of /* ... */ comment + // [^*]*\*+ ## Non-* followed by 1-or-more *'s + // ( + // [^/*][^*]*\*+ + // )* ## 0-or-more things which don't start with / + // ## but do end with '*' + // / ## End of /* ... */ comment + // + // | ## OR various things which aren't comments: + // + // ( + // " ## Start of " ... " string + // ( + // \\. ## Escaped char + // | ## OR + // [^"\\] ## Non "\ + // )* + // " ## End of " ... " string + // + // | ## OR + // + // ' ## Start of ' ... ' string + // ( + // \\. ## Escaped char + // | ## OR + // [^'\\] ## Non '\ + // )* + // ' ## End of ' ... ' string + // + // | ## OR + // + // . ## Anything other char + // [^/"'\\]* ## Chars which doesn't start a comment, string or escape + // ) + // }{$2}gxs; + + return $buffer; + } + + + /* + * Returns the next character in the filtered stream, not including + * Php comments. + * + * @return the next character in the resulting stream, or -1 + * if the end of the resulting stream has been reached + * + * @throws IOException if the underlying stream throws an IOException + * during reading + * @deprecated + */ + function readChar() { + $ch = -1; + + if ( $this->_readAheadCh !== -1 ) { + $ch = $this->_readAheadCh; + $this->_readAheadCh = -1; + } else { + $ch = $this->in->readChar(); + if ( $ch === "\"" ) { + $this->_inString = !$this->_inString; + } else { + if ( !$this->_inString ) { + if ( $ch === "/" ) { + $ch = $this->in->readChar(); + if ( $ch === "/" ) { + while ( $ch !== "\n" && $ch !== -1 ) { + $ch = $this->in->readChar(); + } + } else if ( $ch === "*" ) { + while ( $ch !== -1 ) { + $ch = $this->in->readChar(); + while ( $ch === "*" && $ch !== -1 ) { + $ch = $this->in->readChar(); + } + + if ( $ch === "/" ) { + $ch = $this->readChar(); + echo "$ch\n"; + break; + } + } + } else { + $this->_readAheadCh = $ch; + $ch = "/"; + } + } + } + } + } + + return $ch; + } + + /** + * Creates a new StripPhpComments using the passed in + * Reader for instantiation. + * + * @param reader A Reader object providing the underlying stream. + * Must not be <code>null</code>. + * + * @return a new filter based on this configuration, but filtering + * the specified reader + */ + function chain(Reader $reader) { + $newFilter = new StripPhpComments($reader); + $newFilter->setProject($this->getProject()); + return $newFilter; + } +} + |